Question 1: A solution of phosphoric acid (H3PO4) with a known concentration of 0.250 M H3PO4 is titrated with a 0.800 M NaOH solution. How many mL of NaOH are required to reach the third equivalence point with a starting volume of 72.0 mL H3PO4 according to the following balanced chemical equation:
H3PO4 + 3NaOH -> Na3PO4 + 3H2O
Question 2: A solution of oxalic acid dihydrate (H2C2O4•2H2O) with a known concentration of 0.400 M H2C2O4•2H2O is titrated with a 0.333 M NaOH solution. How many L NaOH are required to reach the second equivalence point with a starting volume of 65.0 mL H2C2O4•2H2O, according to the following balanced chemical equation:
H2C2O4•2H2O + 2NaOH -> Na2C2O4 + 4H2O
Answers
The volume of 0.800 M NaOH solution required to reach the third equivalence point is 67.5 mL
The volume of 0.333 M NaOH solution required to reach the second equivalence point is 156 mL
Stoichiometry: Calculating the volume required to reach equivalence pointFrom the question, we are to determine the volume of NaOH required to reach third equivalence point
Question 1:
The third equivalence point is reached when all three hydrogen ions (H+) in phosphoric acid have reacted with hydroxide ions (OH-) from the sodium hydroxide solution.
From the given balanced equation,
Each molecule of phosphoric acid reacts with three molecules of sodium hydroxide, we can calculate the number of moles of sodium hydroxide required to reach the third equivalence point as follows:
Number of moles =Concentration × Volume
Number of moles of H3PO4 = 0.250 M x 0.0720 L = 0.0180 mol
Number of moles of NaOH required = 3 x 0.0180 mol = 0.0540 mol
Now, we can calculate the volume of the 0.800 M NaOH solution required to supply 0.0540 mol of NaOH:
Volume of NaOH = 0.0540 mol / 0.800 M = 0.0675 L = 67.5 mL
Hence, 67.5 mL of the 0.800 M NaOH solution is required.
Question 2:
The second equivalence point is reached when all the hydrogen ions (H+) in two molecules of oxalic acid dihydrate have reacted with two molecules of hydroxide ions (OH-) from the sodium hydroxide solution. Since each molecule of oxalic acid dihydrate reacts with two molecules of sodium hydroxide, we can calculate the number of moles of sodium hydroxide required to reach the second equivalence point as follows:
Number of moles of H2C2O4•2H2O = 0.400 M x 0.0650 L = 0.0260 mol
Number of moles of NaOH required = 2 x 0.0260 mol = 0.0520 mol
Now, we can calculate the volume of the 0.333 M NaOH solution required to supply 0.0520 mol of NaOH:
Volume of NaOH = 0.0520 mol / 0.333 M = 0.156 L = 156 mL
Hence, 156 mL of the 0.333 M NaOH solution is required
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Related Questions
Reaction of sodium hydroxide with sodium chloride
Answers
There will be "no apparent reaction" when sodium hydroxide and sodium chloride react.
Explain the reaction between sodium hydroxide and sodium chloride?A caustic metallic base is sodium hydroxide (Na OH), sometimes referred to as lye or caustic soda. Caustic soda, an alkali, is commonly employed in a variety of sectors, primarily as a potent chemical base in the production of paper, pulp textile, drinking water, as well as detergents. The most widely used base in chemistry labs is sodium hydroxide, which can be used to test for a variety of cations as soon as to produce alkaline media for several reactions, like the Biuret test.While NaCl is a salt, NaOH is a potent alkali. There is no chemical reaction between these two substances. Nothing. There isn't any response.
Thus, there will be "no apparent reaction" when sodium hydroxide and sodium chloride react.
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The complete question is-
Reaction of sodium hydroxide with sodium chloride will produce ______.
A student attempts to identify an unknown compound by the method used in this experiment. She finds that when she heated a sample weighing 0.5032 g the mass barely changed, dropping to 0.3176 g. When the product was converted to a chloride, the mass went up, to 0.3502 g. a. Is the sample a carbonate? b. What are the two compounds that might be in the unknown?
Answers
a. No, the sample is not carbonate. If it were a carbonate, the mass would have decreased when heated, as carbonates decompose to form carbon dioxide gas and a metal oxide when heated. Since the mass barely changed when the sample was heated, it is not carbonate.
b. The two compounds that might be in the unknown are chloride and a non-chloride compound. When the sample was converted to chloride, the mass increased, indicating that chloride was formed. However, since the mass barely changed when the sample was heated, there must also be a non-chloride compound present that did not decompose when heated.
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50. 0 grams of kci is dissolved in water to make a 4. 00 l solution. What is the molarity of the solution? (molar mass of kci = 74. 5 g/mol).
Answers
The molarity of the solution is 0.168 mol/L. Moles is a unit of measurement used in chemistry to express the amount of a chemical substance.
To find the molarity of the solution, we need to use the formula:
Molarity = moles of solute / liters of solution
First, let's calculate the moles of KCl in the solution:
moles of KCl = mass of KCl / molar mass of KCl
mass of KCl = 50.0 g
molar mass of KCl = 74.5 g/mol
moles of KCl = 50.0 g / 74.5 g/mol = 0.6711 mol
Next, we can plug in the values into the formula for molarity:
Molarity = moles of solute / liters of solution
moles of solute = 0.6711 mol
liters of solution = 4.00 L
Molarity = 0.6711 mol / 4.00 L = 0.168 mol/L
Therefore, the molarity of the solution is 0.168 mol/L.
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(a) Write a balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl.
(b) Write balanced equations for the reactions of phenylmagnesium bromide and trityl fluoborate with water.
Answers
The balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl is mentioned below.
What is a coupling reaction?The coupling reactions are a class of chemical reactions where unification of two or more hydrocarbons coupled with the help of a metal catalyst.
(a) The balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl is:
2C₆H₅Br + 2Na → (C₆H₅)₂ + 2NaBr
(b) The balanced equations for the reactions of phenylmagnesium bromide and trityl fluoborate with water are:
PhMgBr + H₂O → PhH + MgBrOH
Trityl fluoborate + H₂O → Trityl alcohol + HBF₄
Therefore, the balanced equations are given above.
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What is the molar concentration of a solution prepared by diluting 10. 0 ml of the solution in question #1 to a total volume of 50. 00 ml?.
Answers
The molar concentration of the solution prepared by diluting it from 10 ml to 50 ml is 0.0004000 mol/L.
In order to calculate the molar concentration of the diluted solution, firstly we need to know the molar concentration of the original solution and its dilution factor. The dilution factor is the ratio of the final volume to the initial volume. The dilution factor can be calculated here :
dilution factor = final volume / initial volume
dilution factor = 50.00 ml / 10.0 ml
dilution factor = 5.00
The molar concentration of the diluted solution can be calculated by using the formual M1V1 = M2V2
Here M1 is the initial molar concentration, V1 is the initial volume of the solution, M2 is the final molar concentration, and V2 is the final volume.
Putting the values we have in the equation M1V1 = M2V2.
M1 = the molar concentration of the original solution is unknown.
V1 = 10.0 ml
M2 = the molar concentration of the diluted solution is unknown.
V2 = 50.00 ml
Using this formula and solving for M2, we get:
M2 = M1V1 / V2
Since, we do not know the initial molar concentration, M2 can not be calculated directly. But, we do know that the number of moles of solute is the same before and after the dilution. Therefore, we can use the following equation:
n = M1V1 = M2V2, where n is the number of moles of solute.
n = M1V1
M1 = n / V1
after putting in the given values :
n = M1V1
M1 = n / V1 = (10.0 ml / 1000.0 ml/L) x (0.2000 mol/L)
M1 = 0.002000 mol
Since we know the initial molar concentration now, we can use the formula M2 = M1V1 / V2 to find the molar concentration of the diluted solution,
M2 = M1V1 / V2 = (0.002000 mol/L) x (10.0 ml / 50.00 ml)
M2 = 0.0004000 mol/L
Hence, the molar concentration of the solution diluted from 10 ml to 50 ml is calculated out to be 0.0004000 mol/L.
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How many molecules are in 0.0023 moles of CO2?
Answers
Taking into account the definition of Avogadro's Number, 1.38529×10²¹ molecules in 0.0023 mole of CO₂ .
Definition of Avogadro's NumberAvogadro's number is defined as the number of particles (atoms, molecules, ions, electrons) in 12 grams of carbon-12, that is, in one mole of the substance or compound.
Its value is 6.023×10²³ particles per mole and it applies to any substance.
Molecules of CO₂ in this caseConsidering the definition of Avogadro's number, you can apply the following rule of three: If 1 mole of CO₂ contains 6.023×10²³ molecules, 0.0023 mole of CO₂ contains how many molecules?
amount of molecules of CO₂= (0.0023 moles × 6.023×10²³ molecules)÷ 1 mole
amount of molecules of CO₂= 1.38529×10²¹ molecules
Finally, there are 1.38529×10²¹ molecules.
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According to Newton’s law of universal gravitation, which statements are true?
Answers
According to Newton’s law of universal gravitation, the statements that is true is As we move to higher altitudes, the force of gravity on us decreases.
What exactly does the Law of Gravitation apply to?According to Newton's Law of Universal Gravitation, every particle in the cosmos is drawn to every other particle with a force that is directly proportional to the product of their masses and inversely proportional to their distance from one another.
According to Newton's law of universal gravitation, two bodies in space are attracted to one another by a force that is proportional to their masses and the distance separating them. This indicates that they truly exert a discernible influence on one another for huge objects orbiting one another—the moon and Earth, for instance.
Therefore, option A is correct.
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complete options;
As we move to higher altitudes, the force of gravity on us decreases.
As we move to higher altitudes, the force of gravity on us increases.
As we gain mass, the force of gravity on us decreases.
As we gain mass, the force of gravity on us increases.
As we move faster, the force of gravity on us increases.
The cooled sugar solution is (ideally) glassy in luster and fracture pattern, aphanitic with respect to crystal size, and vesicular. Choose all of the following household materials that have a similar luster or texture.
A. Window glass
B. Wooden cutting board
C. Cardboard, cereal box type
D. Ceramic plate
E. Styrofoam cup
F. Steel knife
G. Aluminum baking dish
There can be more than one selection.
Answers
This cooled sugar solution has glassy in luster & fracture pattern, aphanitic in regard to crystal, or vesicular. Glass, a wooden cutting board, or an aluminum baking dish are typical of these materials.
What is glassy behavior?Several soft materials, such as microparticles, foams, emulsions, or other complex fluids, exhibit glassy behavior, including plastics, superalloys, magnetic spin spectacles, disordered conductors, and many soft materials. Glassy phenomena are also present in very many biology, most notably protein.
What does glassy texture mean?This rock has a glassy appearance if it resembles a slab of (colored) glass and lacks mineral crystals that may be seen. The glassy texture gives the impression that cooling was so rapid that no crystalline could form.
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can someone please help me with question 4, i don’t understand?
Answers
14 moles of iron will react with 10.5 moles of oxygen and produce 7 moles of ferric oxide (Fe2O3).
What is the complete statement?According to the balanced chemical equation:
4Fe + 3O_2 ---> 2Fe2O3
For every 4 moles of Fe, we need 3 moles of O_2 to react.
So, to determine the moles of oxygen required to react with 14 moles of iron, we can use the mole ratio from the balanced equation:
14 moles Fe x (3 moles O_2/4 moles Fe) = 10.5 moles O_2
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true/false. hox genes hox genes control which amino acids get plugged into polypeptide chains. control the development of language in humans. function only in fruit flies. appear to function in similar ways across diverse groups of organisms.
Answers
When sodium (na) and chlorine (cl) are combined, a small amount of table salt is formed and a bright yellow light and a lot of heat are given off. Does it take more energy to break the bonds of the reactants, or is more energy released when forming the bonds of the products? how do you know?(1 point).
Answers
Since a lot of heat is produced during the bond- forming process of the products, further energy is released during that process than is frequently the case.
A more accurate dimension of energy use and position is thermal energy. As bonds are broken in the reactants during exothermic processes, further energy is released when the bonds are created in the products. An increase in the response admixture's temperature is a specific of exothermic responses. The term" endothermic" refers to chemical responses that generally absorb( or use) energy. When bonds in the reactants are broken, further energy is absorbed than is released when new bonds are generated in the products. This is known as an endothermic response. As the response's temperature drops, endothermic processes are endothermic.
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It takes more energy to break the bonds of the reactants than to form the bonds of the products. This is because of the Law of Conservation of Energy,
Which states that energy cannot be created or destroyed, only transferred from one form to another. When the reactants undergo a chemical reaction, the bonds between the atoms break and the energy that was stored in those bonds is released in the form of heat and light. This energy is then used to form the bonds between the atoms of the products. This process requires less energy than the breaking of the bonds of the reactants, so overall more energy is released than was used to break the bonds.
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what type of reaction is shown ?
Answers
Ammonium perchlorate is a powerful solid rocket fuel, used in the Space Shuttle boosters. It decomposes into nitrogen gas, chlorine gas, oxygen gas and water vapor, releasing a great deal of energy. Calculate the moles of nitrogen produced by the reaction of 1.6 mol of ammonium perchlorate.
Answers
Answer:
the answer is 1.6 moles.
Explanation:
The balanced chemical equation for the decomposition of ammonium perchlorate is:
NH4ClO4 → N2(g) + 2H2O(g) + Cl2(g) + 3O2(g)
From the balanced equation, we can see that for every 1 mole of ammonium perchlorate decomposed, 1 mole of nitrogen gas is produced.
Therefore, if we decompose 1.6 moles of ammonium perchlorate, we will produce 1.6 moles of nitrogen gas.
So the answer is 1.6 moles.
determine if each statement about the molecule in the reaction below is true or false. phosphoenolpyruvate is a product (click to select) mg 2 ion is a cofactor (click to select) pyruvate kinase is an enzyme (click to select) pyruvate is a substrate (click to select)
Answers
Phosphoenolpyruvate is a substrate (false), Mg2+ ion is a cofactor (true), pyruvate kinase is an enzyme (true), pyruvate is a product (true).
What is Ion?
An ion is an atom or molecule that has a non-zero net electrical charge due to the loss or gain of one or more electrons. If an atom loses electrons, it becomes a positively charged ion, known as a cation, whereas if it gains electrons, it becomes a negatively charged ion, known as an anion. Ions play important roles in many chemical and biological processes, such as in the conduction of electricity in nerves and muscles, the regulation of pH in blood, and the formation of chemical bonds.
"Phosphoenolpyruvate is a product" - This statement is false. Phosphoenolpyruvate is a substrate, meaning it is the starting molecule that undergoes a chemical reaction to produce a product, which in this case is pyruvate.
This statement is true. Mg2+ ion is a cofactor required for the activity of pyruvate kinase enzyme. It acts as a cofactor by binding to the enzyme and playing a key role in catalyzing the chemical reaction.
This statement is true. Pyruvate kinase is an enzyme that catalyzes the transfer of a phosphate group from phosphoenolpyruvate to ADP, resulting in the formation of pyruvate and ATP.
"Pyruvate is a substrate" - This statement is true. Pyruvate is the product formed by the chemical reaction between phosphoenolpyruvate and pyruvate kinase enzyme.
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What volume of water would you need to dissolve 72 grams of salt at 25 degrees Celsius? (show work)
Answers
To need 200 milliliters volume of water to dissolve 72 grams of salt at 25°C.
In water at 25 degrees Celsius, what is soluble?All sodium, potassium, and ammonium salts are soluble. All nitrates, acetates and perchlorates are soluble. Every salt of silver, lead, and mercury(I) is insoluble. Iodides, bromides, and chlorides are all soluble in water.
Why does water become liquid at 25 °C?The water molecules are dipolar due to the substantial polarity difference between oxygen and hydrogen. As a result, a hydrogen bond forms between the H and O of nearby water molecules. It is this powerful hydrogen bond, which compacts the water molecules firmly together, that causes water to be a liquid at normal temperature.
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What is the molarity of solution if 42.1 grams of KOH is dissolved in 3.0 L of solution?
Answers
Answer:
the molarity of the solution is 0.25 M.
Explanation:
To calculate the molarity of a solution, we need to know the amount of solute in moles and the volume of the solution in liters.
The first step is to calculate the amount of KOH in moles using its molar mass. The molar mass of KOH is the sum of the atomic weights of potassium (39.1 g/mol), oxygen (16.0 g/mol), and hydrogen (1.0 g/mol):
Molar mass of KOH = 39.1 g/mol + 16.0 g/mol + 1.0 g/mol = 56.1 g/mol
The amount of KOH in moles is:
moles of KOH = mass of KOH / molar mass of KOH
moles of KOH = 42.1 g / 56.1 g/mol
moles of KOH = 0.750 moles
Now that we know the amount of KOH in moles, we can calculate the molarity of the solution:
Molarity = moles of solute / liters of solution
Molarity = 0.750 moles / 3.0 L
Molarity = 0.25 M
Therefore, the molarity of the solution is 0.25 M.
Answer: 9.23 moles of solute
Explanation: It's a hard explanation so you can just have the answer.
Rank the following dienes in order of increasing reactivity in a Diels-Alder reaction, listing the least reactive first.(A) l < lll < ll(B) l < ll < lll(c) lll < l < ll(d) ll < l < lll
Answers
l < ll < lll is the following dienes in order of increasing reactivity in a Diels-Alder reaction, listing the least reactive first.
What is reactivity ?
An atom's or molecule's potential to interact chemically with another atom, molecule, or compound. Chemical reactivity is the ability or willingness of a substance to undergo a reaction. Energy can be released when the substance reacts with another substance or with itself.
What is reaction ?
The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds. The transformation of one or more reactants into one or more new products is referred to as a chemical reaction. Substances are made of chemical constituents or compounds.
s-cis dienes react faster than s-trans diene toward diels alder reaction
Since
ll is s-cis diene and is rigid molecule therefore will always be in this orientation hence reace fastest .
lll is s- trans form and is rigid molecule with no free rotation ,hence can never attain
s-cis form hence will be least reactice towards diels alder reaction .
l is aliphatic hence free rotation around single bond so , beacuse of this free rotation can cause two alkens to come in s-cis form to give faster diels alder but will take some time to come in s cis form hence its reactivity will be lesser than ll which is already in s-cis form.
Therefore, l < ll < lll is the following dienes in order of increasing reactivity in a Diels-Alder reaction, listing the least reactive first.
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which of the following resonance structures is the least important contributor to the resonance hybrid of the formate anion, hcoo-
Answers
The odd one out is Structure C, which essentially possesses none of the traits of a significant resonance structure.
Which resonance structure from the list below makes the biggest contribution to the resonance hybrid?The resonance hybrid will be most influenced by the resonance form with the lowest formal charges. In a molecule, an atom is given a formal charge. The resonance structure is more stable as formal charges decrease.
Which of the following resonance structures is the least stable?The negative charge on the carbon atom connected to the NH2 group, which is an electron donor by nature, makes Structure (A) the least stable resonant structure and will lead the molecule to become unstable.
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What must happen for a nucleus to be stable?
OA. The strong nuclear force must balance electrostatic forces in the
nucleus.
B. The electrostatic force must be stronger than the strong nuclear
force.
OC. The number of protons must be greater than the number of
neutrons.
D. The number of neutrons must be greater than the number of m
quarks.
Answers
Neutron-to-proton ratios of at least and even numbers of protons and neutrons are characteristics of stable nuclei. It is common for particularly stable nuclei to have protons and neutrons in magic numbers.
Protons and electrons: what are they?A subatomic particle having a negative charge is an electron. A strong nuclear force keeps protons together in the nucleus of an atom. A particular subatomic particle without no charge is the neutron.
What materials make up neutrons?Neutrons are made up of one up quark and three down quarks. This "strong nuclear force," one of the four basic forces, keeps the nucleus together. Two more are gravity and electromagnetism.
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Answer:its a
Explanation: bc im just him
During the first half of the 20th century, radium was used in various hair creams, toothpaste, and even chocolate! Radium-223 undergoes β decay with a half-life of 11.4 days. What is the activity of a sample that contains 1.00 µg of radioactive 223Ra? Express your answer in curies.
Answers
The activity of the sample containing 1.00 µg of radioactive 223Ra is 5.14 x 10^-5 curies.
How do we calculate?We will use the equation
Activity = (number of radioactive nuclei) x (decay constant)
The number of radioactive nuclei can be found using Avogadro's number, which gives the number of atoms in a mole of substance.
For 223Ra, the number of atoms in 1.00 µg (or 1.00 x 10^-6 g) is:
(1.00 x 10^-6 g) / (223 g/mol x 6.022 x 10^23 atoms/mol) = 2.69 x 10^14 atoms
The decay constant is found as:
t1/2 = 11.4 days = 9.84 x 10^5 seconds (since 1 day = 8,6400 seconds)
λ = ln(2) / t1/2 = 7.05 x 10^-9 s^-1
In conclusion, the activity of the sample is:
Activity = (2.69 x 10^14 atoms) x (7.05 x 10^-9 s^-1) = 1.90 x 10^6 Bq
When converted to curries, we have:
Activity = (1.90 x 10^6 Bq) / (3.7 x 10^10 Bq/Ci) = 5.14 x 10^-5 Ci
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use the conductivity interactive to identify each aqueous solution as a strong electrolyte, weak electrolyte, or nonelectrolyte.
Answers
The strong electrolytes are;
NaCl,HCl and NaOH
The weak electrolytes are ammonia
The non electrolyte is sucrose
What is a strong or weak electrolyte?A strong electrolyte is a substance that dissociates completely into ions when it is dissolved in water, meaning that all of the molecules of the substance break apart into their constituent ions. Strong electrolytes include ionic compounds such as sodium chloride (NaCl) and strong acids such as hydrochloric acid (HCl).
In contrast, a weak electrolyte is a substance that only partially dissociates into ions when it is dissolved in water, meaning that only some of the molecules of the substance break apart into their constituent ions. Weak electrolytes include weak acids such as acetic acid (CH3COOH) and weak bases such as ammonia (NH3).
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Missing parts;
Use the Conductivity interactive to identify each aqueous solution as a strong electrolyte, weak electrolyte, or nonelectrolyte. You are currently in a sorting module. Turn off browse mode or quick nav, Tab to items, Space or Enter to pick up, Tab to move, Space or Enter to drop.
Strong electrolyte Weak electrolyte Nonelectrolyte
NH3 NaCl HCI NaOH C12H22O
Consider the following mechanism.
O3 → O2 + O (slow) O3 + O → 2O2 (fast)
a. Write the overall balanced chemical equation.
b. Identify any intermediates within the mechanism.
c. What is the order with respect to each reactant?
d. Write the rate law for the overall reaction.
Answers
Answer:
a. The overall balanced chemical equation for the reaction is: 3O3 → 3O2 + O b. The intermediate in the mechanism is O3. c. The order of the reaction is first order with respect to O3 and second order with respect to O. d. The rate law for the overall reaction is rate = k[O3]^1[O]^2.
If a current of 15. 0 a is applied to a solution of cr3+ ions, how long will it take to plate out 1. 86 g of chromium metal?.
Answers
To calculate the time it will take to plate out 1.86 g of chromium metal when a current of 15.0 A is applied to a solution of Cr3+ ions, we can use Faraday's Law of Electrolysis:
This law states that the amount of substance deposited at an electrode during electrolysis is directly proportional to the amount of electric charge that passes through the solution.
t = (1.86 g Cr) / (F * I * n * m)
Where F is Faraday's Constant (96485 C/mol), I is the current (15 A), n is the number of electrons exchanged (3) and m is the molar mass of chromium (52 g/mol).
Substituting the values in place we get
t = 1.86 g / 96485 * 15 * 3 * 52
[The units for a charge, electricity and gram get canceled out and we are left with the unit of time]
Thus giving us a result of t = 1.6 seconds.
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1. determine the ph and percent ionization for a 0.0500 m hno2 solution. the ka for hno2 is 3.94 x 10-4 .
Answers
The 0.0500 M HNO2 solution has a pH of 1.81 and a 44.5% ionisation percentage.
What is pH and how is it determined?A solution's acidity or basicity is determined by its pH. It is described as the solution's hydrogen ion concentration's negative logarithm. While lower pH values denote acidity and higher ones denote basicity, a pH of 7 is regarded as neutral.
Since HNO2 is a weak acid, the percent ionisation and pH of the solution can be determined using the acid dissociation constant (Ka) formula.
Ka = (H+)(NO2-)/(HNO2)
We can write: Ka = x2 /, where x is the concentration of H+ and NO2- and (0.0500-x) is the concentration of HNO2 (0.0500 - x)
The quadratic formula is used to solve for x, and the result is x = 0.0154 M
For these reasons, [H+] = [NO2-] = 0.0154 M and [HNO2] = 0.0346 M.
We apply the formula: to determine the % ionisation.
% ionisation is calculated as [H+]/[HNO2] x 100%, or (0.0154 / 0.0346) x 100, or 44.5%
We use the following formula to determine pH:
pH = -log(0.0154) = 1.81 where pH = -log(H+)
As a result, the 0.0500 M HNO2 solution has a pH of 1.81 and a 44.5% ionisation percentage.
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match the classes of enzymes with their functions: group of answer choices catalyze cleavage of molecules driven by addition of water hydrolases catalyze transfer of functional groups within a molecule isomerases catalyze linking two molecules into a larger one ligases catalyze electron transfer reaction between two molecules oxidoreductases catalyze transfer of functional groups between different molecules
Answers
Isomerases and hydrolases, which start the bond-breaking process when water is introduced to a molecule, move functional groups inside a molecule to create isomers.
What kind of hydrolases are examples?Esterase's, such as lipases, calcium - dependent, glycosidases, peptidases, and nucleosidases, are typical examples of hydrolase enzymes. The fact that hydrolase enzymes have degradative characteristics makes them crucial for the organism.
Where in the body can you find hydrolase?The kidneys and the liver have large quantities of this enzyme, and many other human tissues also contain minor amounts of it. The amino acid tyrosine, a component of many foods' proteins, is broken down by the final of a group of five enzymes, fumarylacetoacetate hydrolase.
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How many g KCl are produced if 3.3 mol O₂ is produced?
Answers
The concept stoichiometry is used here to determine the mass of KClO₃ produced from 3.3 mol of oxygen . The mass of KClO₃ produced is 269.61 g.
What is stoichiometry?
The stoichiometric concept is generally used for the calculations of masses and sometimes the volumes and reactants and products involved in a chemical reaction. The relationship between the amounts of reactants and products can be obtained in a chemical reaction.
The reaction is:
2KCl + 3O₂ → 2KClO₃
The number of moles of KClO₃ formed is:
3.3 mol O₂ × 2 mol KClO₃ / 3 mol O₂ = 2.2 mol KClO₃
The molar mass of KClO₃ = 122.55 g/mol
The mass of KClO₃ = 2.2 mol × 122.55 g/mol = 269.61 g
Thus the mass of KClO₃ formed is 269.61 g.
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Your question is incomplete, but most probably your full question was.
How many g KClO₃ are produced if 3.3 mol O₂ is reacted?
For the reaction of sulfur dioxide and oxygen to produce sulfur trioxide, shown below, what is the equilibrium concentration of sulfur dioxide, SO2, if the equilibrium concentrations of O2 and SO3 are 0.12 M and 0.015 M, respectively?
2 SO2(g) + O2(g) ⇄ 2 SO3(g) K = 1.5
Answers
The equilibrium concentration of sulfur dioxide, SO2, is 0.084 M.
What is equilibrium?Equilibrium is a state in which opposing forces or influences are balanced. It is a state of balance between opposing forces or actions in which the forces cancel each other. In economics, it is the state in which market supply and demand balance each other out and in which the prices of goods and services are stable. In physics, equilibrium is the state in which an object experiences no net force and its velocity is constant. In chemistry, equilibrium is the state in which the rates of the forward and reverse reactions are equal.
At equilibrium the reaction will be at its equilibrium constant value, K. This means that the concentration of SO2 can be determined by rearranging the equilibrium expression, K = [SO3]2/[SO2]2, and solving for [SO2].
[SO2] = sqrt([SO3]2/K)
[SO2] = sqrt((0.015)2/1.5)
[SO2] = 0.084 M
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What is the volume in liters of 5.50 moles of CO2 at standard
temperature and pressure (STP)?
Answers
The volume of 5.50 moles of CO2 at STP is 120.02 liters.
What is standard temperature and pressure?To calculate the volume of 5.50 moles of CO2 at standard temperature and pressure (STP), we need to use the ideal gas law:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
At STP, the pressure is 1 atmosphere (atm) and the temperature is 273.15 Kelvin (0 degrees Celsius). The gas constant is 0.08206 L•atm/mol•K.
So we can plug in the values and solve for V:
V = nRT/P = (5.50 mol)(0.08206 L•atm/mol•K)(273.15 K)/(1 atm) = 120.02 L
Therefore, the volume of 5.50 moles of CO2 at STP is 120.02 liters.
Standard temperature and pressure (STP) is a set of standard conditions used for measuring and comparing the properties of gases. STP is defined as a temperature of 273.15 Kelvin (0 degrees Celsius) and a pressure of 1 atmosphere (atm). These standard conditions allow scientists to compare the behavior of gases under the same set of conditions, making it easier to compare and contrast the properties of different gases.
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The number of moles is 123.2 moles
How can you find the volume form moles?To find the volume of a substance from its number of moles, you will need to know its molar volume, which is the volume occupied by one mole of a substance. The molar volume can vary depending on the temperature and pressure, so you will need to specify these conditions.
The formula to calculate the volume of a substance from its number of moles is:
Volume = Number of moles x Molar volume
We know that;
1 mole occupies 22.4 L
5.5 moles occupies 5.5 moles * 22.4 L/1 mole
= 123.2 moles
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what happens when you burn copper
Answers
Answer:
Explanation:
Copper oxidizes to copper When copper is heated in air, it is oxidised to copper (II) oxide and the reddish brown metal turns black as the copper is oxidised to copper (II) ions. Hence the copper is changed to copper oxide. Therefore, the copper gains oxygen in accordance with the given reaction.
What is the volume of oxygen O2 found in 41.1 grams of oxygen at STP?
Show work please
Answers
The volume of oxygen gas found in 41.1 grams at STP is 28.69L.
How to calculate volume at STP?The volume of a gas can be calculated using Avogadro's law equation as follows:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperatureThe number of moles in oxygen gas can be calculated as follows:
moles = 41.1 ÷ 32 = 1.28 moles
At STP;
v = ?p = 1atmR = 0.0821T = 273K1 × V = 1.28 × 0.0821 × 273
V = 28.69L
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The volume of oxygen found in 41.1 grams of oxygen at STP is 28.77 L
What is the volume of gases at STP?At Standard Temperature and Pressure (STP), the volume of 1 mole of any ideal gas is 22.4 liters. STP is defined as a temperature of 273.15 K (0°C) and a pressure of 1 atmosphere (atm).
To find the volume of oxygen present in 41.1 grams of O2 at STP, we need to use the following steps:
1 mole of oxygen or 32.0 g has a volume of 22.4 L
41.1 g will have a volume = 41.1/32 * 22.3
The volume of oxygen gas = 28.77 L
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